Where will you be in Texas when you are there. Its a big state man. England (Whales and Scotland) 32.22 milion acres, Texas (a state) 171,891,840 acres..... LOL, just a little fun here.....
The Hill Country North of San Antonio has several ranches that offer exotics. This is basically where the exotic hunt trade started in the US. I would look around Kerrville. Hogs are always on the menue where ever you go in the state. If you want the big deal, Nilgai (Blue Bull), can be had on some of the big South Texas ranches but its not cheap...
This is all based on your time of year being April. Also remember by that time of year from San Antonio South it could be in the upper 80's F or more. Game will be playing the weather and be active early and late as the temps rise.